Electromagnetic contactor, electromagnetic contactor gas encapsulating method, and electromagnetic contactor manufacturing method

Abstract

An electromagnetic contactor has a base plate having an aperture hole; an arc extinguishing chamber having a fixed terminal and a pipe; and a bottomed tubular cap in which one end thereof is open. An arc extinguishing chamber connection portion is formed by the arc extinguishing chamber and a first connection member having a tube portion connected to the arc extinguishing chamber and a flange portion contacting with the base plate. A cap connection portion is formed by the cap and a second connection member having a tube portion connected to the cap and a flange portion connected to the base plate. The flange portions of the first and second connection members are attached to one surface and the other surface of the base plate accordingly. The arc extinguishing chamber connection portion and the cap connection portion are in communication through the aperture hole of the base plate.

Description

TECHNICAL FIELD[0001]The present invention relates to an electromagnetic contactor including a contact device that includes a fixed contact and movable contact interposed in a current path, and in particular, relates to the electromagnetic contactor, a gas encapsulating method whereby gas is encapsulated inside the electromagnetic contactor, and an electromagnetic contactor manufacturing method.BACKGROUND ART[0002]A heretofore known gas encapsulating structure (hereafter called a capsule structure) of an electromagnetic contactor is the kind of structure shown in FIG. 5 wherein, specifically, a fixed contact 26, a movable terminal 27 having a movable contact 27a, a movable shaft 28, a contact spring 29, and the like, are incorporated inside an arc extinguishing chamber 1. Also, a movable iron core 30 and return spring 31 to which the movable shaft 28 is linked are incorporated inside a cap 8. No description will be given of details at this point.[0003]Firstly, the arc extinguishing ...

AI Technical Summary

Benefits of technology

The invention provides a method and device for encapsulating and evacuating gas in a more efficient and cost-effective way compared to current methods. This method eliminates the need for expensive equipment and reduces the time required for gas encapsulation and evacuation, resulting in improved production rates. Additionally, the method improves mass productivity and allows for better control of gas pressure. The manufacturing process is also simplified as there are fewer assembly steps required.

Problems solved by technology

Because of this, there is a problem in that the gas encapsulation chamber 14 is also unavoidably of a large size.

Because of this, there is a problem in that a considerable time is needed for the evacuating and charging of the gas encapsulation chamber.

With this kind of step, there is a problem in that the amount of encapsulated gas consumed also increases.

Because of this, it cannot be said that the gas encapsulating type of laser welding is a technologically easy manufacturing method.

Also, as laser welding is carried out through the transparent glass window 22 of the chamber 21, a large amount of spatter, fumes, and the like, are generated when welding, meaning that there is a problem in that the transparent glass window 22 becomes dirty, and the inside of the chamber 21 becomes dirty easily.

With this method, however, there is also a problem in that the size of the chamber increases.

However, when the gas encapsulation pressure becomes a gas pressure of a few atmospheres or more higher again, it becomes difficult to carry out seal welding with good mass productivity, while maintaining the gas encapsulation pressure, in the gas encapsulation chamber of the heretofore described kind of gas encapsulating type projection welding method and the chamber of the laser welding method.

In particular, as brazing or soldering is a separate step requiring air tightness, unnecessary time is taken.

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